Undetected and undocumented cases of COVID-19 were largely responsible for the rapid spread of the virus in China. 86% of all infections were undocumented before the January 23 Wuhan travel shutdown. Per person, the undocumented infections were half as contagious as documented infections but were the source of two-thirds of documented infections.
In all three types of frontotemporal dementia, researchers found the more the inflammation in each part of the brain, the more harmful the build-up of junk proteins.
SARS-CoV-2 is detectable in aerosols for up to three hours and up to four hours on copper. On cardboard, the virus is detectable for up to 24 hours, and up to three days on plastic and stainless steel. The study suggests the virus may be acquired through the air in addition to touching surfaces.
Damage to the nasal epithelium increases the risk of bacteria entering into the brain, potentially resulting in long-term health problems.
Australian researchers have mapped immune responses from one of the country's first COVID-19 patients. The findings shed light on how the immune system fights the virus and assists in recovery from the virus.
Researchers report the firing patterns of grid cells are less stable in older adults. This, they say, could be why older people have more problems with spatial navigation than younger people.
A new study reports Sirt1 can help glial cells to regenerate from progenitor cells in preterm babies with hypoxia related injuries.
A combination of neuroimaging and long term memory tests could help with the early diagnosis of Alzheimer's disease, researchers report.